John w



(N0 Modl.) J. PROWLES,

BOX. No. 360,366. Patented Mar. 29, 1887.

WITNESSES INVENTOR @M'A m w. M

A9 ATTORNEYS Lih grzphcr, Washingiom a c.

UNITED STATES PATENT OFFICE.

JOHN 'W. SPROVLES, OF PHILADELPHIA, PENNSYLVANIA.

BOX.

SPECIFICATION forming part of Letters Patent No. 360,366, dated March 29, 1887.

Application filed February 17, 1886. Serial No. 192,241.

To all whom it may concern:

Be it known that I, JOHN W. SPRowLEs, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Boxes; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawlugs, and to letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a perspective view of my improved box. Fig. 2 is a vertical section of the same.

This invention relates to improvements in boxes for holding chloride of lime, caustic soda, caustic potash, salt of tartar, pearlash, chloride of zinc, and chloride of calcium, or other corrosive alkali.

The invention is designed as an improvement upon the box patented to me February 3, 1880, in patent numbered 224,052; and it consists in the peculiar arrangement and adaptation of devices, as will be hereinafter more fully set forth, and specifically pointed out in the claim. a

I find by experiments that the coating 1 use will not answer on paper or paper-board, but

that it is fully efficient on wood, as it enters into the pores of the wood, while on paper or paper-board it will not enter the paper, and for that reason it will not hold to the paper or paper-board, and when the coating or lining used is loose it will break, and the consequence will be that the contents of the box will pass through the breaks of the lining and destroy the box.

Referring by letter to the accompanying drawings, A designates the body of the box, the outer layers of the bottom B and sides 0 of which are composed of pasteboard or paperboard. The interior of the bottom is covered with a lining, D, ofwood, and the interior of the sides is also covered with a lining, E, of wood, which projects slightly above the upper edge of the body A of the box to form the internal flange or edge, F,for thelid G. The wood No model.)

lining D, for both the interior of the bottom and the interior of the side or body, is amply covered with a coating or layer of common roofing-pitch, H, which renders it impervious to air and water, and also to the action of any of the articles above enumerated which it is designed to contain. The lid G of the box c0nsists of the pasteboard or paper-board exterior. having a lining of wood for the inner face of the top only. The interior diameter of this cover or lid is greater than the exterior diameter of the wooden layer of the box'body. When in place on the body of the box, the projecting upper wooden edge of the lining of the body forms a wooden lining for the vertical walls of the lid, and opposes the under side of the top of the lid. The lid is also provided with a coating, J, of pitch, which is thinnerat its circumference than throughout the rest of its extent, in order that the pitch-lined wooden interior of the body of the box and the pitch lining of the cover may come in contact to form an air-tightjoint, and that the pitch lining of the lid G may serve as a stopper for the box, and thus fully protect the contents of the box from the action of dampness or moisture.

I am aware that it is not new to form a box entirely of wood and line the same with pitch; but in such boxes there is no pitch used on the cover to securethe same to the box.

In my patent above referred to I have not shown pitch on the inner side of the cover, and consequently cannotseal the cover or form an air and water tightjoint.

It will be seen that by having paper on the exterior of the box a much better means is attained for attaching labels, and I find by ex periment that the pitch will not answer on paper, but is very efficient on wood,as it enters the pores of the wood. I therefore attach importance to the employment of paper on the outside of the box and the pitch lining on the inner wood surface. I also attach importance to the use of pitch on the inner side of the cover, as by such use an air and water tight 9 joint may be formed. Vhen it is desirable to sidewalls of the box will embed themselves therein, and when the pitch becomes cool an air-tight joint will be formed.

I am aware that wax or wax-lined paper has been used for the purpose of forming tight joints in shipping-boxes; but it is obvious that such would not answer the present obj ect, as it is desirable that the pitch used should not only answer for forming a tightjoint, but also serve as a means of securing the cover to the box, and with this object in View I have arranged the Wood between the paper and pitch in the body of the box, so as to have the same embed itself in the pitch on the cover.

Having described this invention, what I claim, and desire to secure by Letters Patent, 1s-

As an improvement upon the box patented to me inPatent No. 224,052, the box-body of thin Wood, of an interior lining of pitch, and of 20 an exterior lining of paper, and the cover comprising a layer of thin wood and an interior lining of pitch on the wood, the interior diameter of the cover being greater than the exterior diameter of the wooden layer of the 25 box-body, whereby when the cover is heated and pressed upon the walls of the box they will be embedded in the pitch lining of the cover, as and for the purpose set forth.

In testimony whereof I affix mysignature in 0 presence of two witnesses;

JOHN T. SPROVLES. 

